Printing plate after an antique original of a drawing

Rectangular printing plate after an antique original of a drawing / illustration from the 20th century; printing plate signed by Adolf Hengeler (1863 - 1927); the motif - "A professor operates a children's punishment machine to spank the bad boys"; the depiction is coarse and comical and somewhat reminiscent of Wilhelm Busch; Adolf Hengeler was a famous German painter in the 19th and 20th century and a hard worker for the newspaper "Fliegen Blätter" where he made many drawings; signs of wear corresponding to the age (see photos); approx. And 20th century and a diligent contributor to the newspaper "Fliegende Blätter" where he made many drawings; traces according to age and use; measurements (see photos); dimensions: approx. 10.5 x 14.5 cm